– a paragraph level RSS feed out from a particular web page, where each feed item carries the URL of the original paragraph;

– a feed of comments an individual commenter (commentator?) has made across all the posts on a particular blog, where each feed item contains a guid that refers to the paragraph that was being commented on.

So, whilst I don’t have time at the moment to post a working demo, it should be able to combine these two feeds to provide an inline commented view of a document, such as the one shown above, that represent a version of the (single page) doc with inline annotations from a single commentator.

This approach could also be used to provide an “expert commentary” around a document, e.g. in an educational setting?